[all-commits] [llvm/llvm-project] 49e229: [GVN] Properly combine AA metadata if available lo...

[Antonio Frighetto via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 49e2295cf52cac72cc3d3bcb4738582bc0c6bde1
      https://github.com/llvm/llvm-project/commit/49e2295cf52cac72cc3d3bcb4738582bc0c6bde1
  Author: Antonio Frighetto <me at antoniofrighetto.com>
  Date:   2026-05-26 (Tue, 26 May 2026)

  Changed paths:
    M llvm/lib/Transforms/Scalar/GVN.cpp
    A llvm/test/Transforms/GVN/PRE/pre-load-combine-metadata.ll

  Log Message:
  -----------
  [GVN] Properly combine AA metadata if available load is hoisted (#197948)

Ensure the AA metadata are properly merged between the new load and the
old one during PRE. Actually set `DoesKMove` in `combineMetadataForCSE`,
otherwise the new load is assumed not to move, which is not correct if
the new load has happened to be hoisted.

Fixes: https://github.com/llvm/llvm-project/issues/196787.



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